Parking way control system



6 Sheets-Sheet 1 Filed May 9, 1947 X M "m P mw m I r p A 1 0 D 4 :T I B u" n 0 w m 4 wwu m w m 6 MT 1 a 1 v March 11, 1952 P, DUNN 2,588,502

PARKING WAY CONTROL SYSTEM Filed May 9. 1947 6 Shets-Sheet 2 will)".

fifi- 9 be 3 0 53 @5525 6 30 /8/ w a2 aw u 86 y a :s a? 7 JJ'PIDPDUII m INVENTOR. 3

. HrToPA/EY March 11, 1952 DUNN 2,588,502

PARKING WAY CONTROL SYSTEM Filed May 9, 1947 6 Sheets-Sheet 3 IZIDPDUII INVENTOR.

A7- rozpzvzr l l l 12. I H h/ 7 /34 l H ///q March 11, 1952 p, DUNN 2,588,502

PARKING WAY CONTROL SYSTEM Filed May 9, 1947 6 Sheets-Sheet 4 M4 M8 M6 mnPfluun IN VEN TOR.

7g%{j$ /24 m9 4% m ATTOPNE'X March 11, 1952 N 2,588,502

PARKING WAY CONTROL SYSTEM Maw 'ber, barrier and remote control.

Patented Mar. 11, 1952 UNITED STATES PATENT OFFICE PARKING WAY CONTROL SYSTEM Fred P. Dunn, Glendale, Calif.

Application May 9, 1947, Serial No. 746,889

Claims.

This invention has to do with automobile parking area Way control systems, i. e. equipment installed for example in an entrance way and presenting a barrier preventing entry of the automobile to its parking location until the barrier is displaced, as under control of a coin operated mechanism. Particularly the invention is concerned with improvements in the general type of controls disclosed in my copending application Serial No. 697,582, filed September 1'7, 1946, on Parking Lot Way Control now Patent No. 2,581,788, issued January 8, 1952.

As with respect to the characteristics of the controls shown in that application, the present types may have as their essential parts a barrier movable vertically into and out of a vehicle arresting position, and connected mechanisms capable of remote control for actuating the barrier between its arresting and vehicle passing positions. Particularly contemplated in both instances is a type of shock resistant barrier displaceable vertically from the ground or passageway level between extreme positions.

One of my major objects now is to provide a type of barrier control responsive to the weight ,of the vehicle to effect vertical movement of the barrier. In accomplishing this purpose, I may employ an appropriate movable support or member connected to the barrier in a manner such that displacement of the member by the vehicle weight produces an actuation of the barrier. In order, however, for a cycle of the barrier displacement to occur and in a manner permitting advancement of the vehicle through the passageway, ultimate operation of the apparatus is governed by a remote control, such as an adaptable coin control mechanism operable by the vehicle driver to the exclusion of the usual parking attendant.

In its more particular aspects the invention contemplates different specific operative relationships between the weight responsive mem- Generally, it is contemplated that actuation of such member may cause either raising or lowering of the barrier, and that the functional relationships of the remote control will be governed accordingly.

While the various objects and features of the invention might preliminarily be recited at considerable length, all these as well as the details of certain illustrative embodiments will be most readily understood from the following descriprangement ofthe control mechanism;

Fig. 2 is a side elevation of Fig. 1;

Fig. 3 is a front elevation of Fig. 1 from the entrance side;

Fig. 4 is an enlarged vertical sectional view taken on line 4-4 of Fig. 2;

Fig. 5 is a horizontal sectional view taken on line 55 of Fig. 4;

Fig. 6 is a transverse vertical view taken on line 66 of Fig. 4;

Fig. 7 is an enlarged vertical sectional view taken on line 1-4 of Fig. 1;

Fig. 8 is a transverse vertical sectional view taken on line 8--8 of Fig. 7;

Fig. 9 is a sectional view taken on line 9-9 of Fig. 8;

Fig. 10 is an enlarged fragmentary sectional view taken on line l0lfl of Fig. 1;

Fig. 11 is a view similar to Fig. 4 illustrating another embodiment of the invention;

Fig. 12 is a fragmentary transverse sectional view taken on line l2-l2 of Fig. 11;

Fig. 13 is an enlarged fragmentary horizontal section taken on line i3--l3 of Fig. 11;

Fig. 14 is a vertical sectional illustrating the modified form of coin control; 4

Fig. 15 is a transverse section taken on line I5|5 of Fig. 14;

Fig. 16 is a vertical sectional view taken on line Iii-l6 of Fig. 15;

Fig. 17 is a vertical sectional view illustrating another embodiment of the invention;

Fig. 18 is a side elevation of a control mechanism embodying a secondary stopping means;

Fig. 19 is an enlarged transverse section taken on line l9-l9 of Fig. 18; and

Fig. 20 is an enlarged vertical section of a stopping means with the operating cylinder in elevation.

Figs. 1 to 10 illustrate one embodiment of the invention for controlling a passageway W for a parking area. The control mechanism generally indicated at It! includes a vertically movable barrier l l positioned midway between guide posts l2 bordering the passageway, weight responsive means I3 operated by the automobile passing thereover, and a connection 14 for transmitting movement from the weight responsive means to the barrier I I. The operation of the barrier and the weight responsive means I3 is governed by a coin control l5 located remotely therefrom, preferably positioned to be accessible to the driver of an approaching automobile, as illustrated in Figs. 1 to 3.

The barrier II is preferably tubular and movable vertically in .a guide tube 16 having its 3 major portion positioned below the ground line H. A pit I8 for housing the connection I4 and various parts of the control I5 extends transversely of the way W and is covered by a plate NH. The weight responsive means I3 includes a pair of tread plates I9 and normally extending upwardly and inwardly from their elastically anchored ends A, to be connected together by hinge21z The -tread plates extend longitudinally through the way W and are located at one side in line with the wheels at one side of the automobile entering the parking area. These plates are trough shaped to have a major horizontal plate portion 22 provided with vertical side flanges 23 having oppositely outwardly projecting horizontal flanges or aprons 24. Guide angles 25 at opposite sides of the troughs position the troughs and close and space beneath them.

The connection I4 includes a lever 26 pivoted at 27 to a chalnne ljnember 28 located at the outer end of the pit IB. The lever 26 is preferably formed of apair of spaced members 29 receiving between them a link 30 depending from the hinge 21. A transverse pin 3| projecting from opposite sides of the link is received in an elongated opening: 32 in each of the members 29. The other ends of the members are inwardly convergent andearry an extension 33 operatively connected with the movable, barrier II. As illustrated inFigfs. 4 and 5 the extension 33 operates in a vertical slot 331 in the guide tube l6 and projects. through an opening 332 in barrier II. A pair er links 34 have their upper ends pivotally connected at 35 to the projection 33, while their never ends are pivotally connected at36 to thejb'ottom of the barrier II.

The coin control I5, located remote from the barrier and v accessible from the drivers seat when the elite ing autiimobile has reached a position where 'its name wheel is on the tread I9, includesfrectangular housing 3! carried on the upper end of the 1 10, 1; 3.8. The coin control governs operation iii the weight responsive means I3 and subsegiient operation of 'the barrier II through the connection I4. While any of various typesmay. be used, I have. shewn a hydraulic eentrera't including 'a cylinder 4'! and ram or piston 42 positioned under the arm 26 and in alinement with link 30 connected to the arm. The cylinder and ram normally prevent actuation of the weight responsive means I3 and retraction or the barrier II until the coin control I5 has been conditioned. The cylinder 4| is connected by a conduit 44 with a valve body 43 located remote from the barrier and within housing 31 of the coin control. The valve body typically illustrated contains a slide valve 45 operating in a central bore 46 of the body to control communication between the cylinder port 41 and the reservoir port 48. As shown in Fig. '7, this port is connected with the reservoir 49 in the upper portion of the housing 31 by a conduit 50. An air vent V is provided in the filling plug P to put the reservoir in communication within the atmosphere, and a dust cop C houses the filling pipe. Valve 45 has a reduced portion 5| intermediate its ends to permit communication between ports 41 and 48 and which normally are held out of register by a coin controlled latch 52. A by-pass port 53 puts the lower end of the valve bore 46 in communication with the cylinder port 41 to impose the cylinder pressure -on the lower end of the slide valve. The upper reduced end portion 54 of the valve extends through an opening 55 in the valve body and is provided with a head 56.

The coin controlled latch 52, normally holding the valve in its closed position, includes a lever 51 pivoted at 58 to the underside of the reservoir 49 and carrying a roller 59 for engaging the head 56 of the valve. Lever 51 is normally vertical out of axial alinement with the valve 45. A lateral arm 60 of the lever carries a roller 6| at its outer end for the purpose to be subsequently described.

The typical coin control I5 includes an operating crank 62 positioned at one side of the housing 3! and carried on a horizontal shaft 63 extending into the housing. A pair of discs 64 located inside the housing have complementary coin receiving notches 65, normally in register with a coin chute 66 formed integrally with the housing. The outer disc 64 is fixed to the shaft 63 while the inner disc 64 is rotably mounted thereon. The inner disc carries a cam 5'1 cooperating with roller SI of the latch 52. A coin received in the registering notches of the discs 64, keys the two discs together for transmission of rotation from the outer disc to the inner disc and cam 61, causing subsequent tripping 0f the latch 52 against the action of the spring 68.

Upontripping of the latch 52, the fluid pressure in the cylinder 4|, produced by the weight imposed on the plate I9 by the automobile, is conducted through line 44 to the valve 43 and is by-passed through passage 53 to the lower end of the valve 45 to cause its upward movement. The valve portion 5| thus is brought in register with the cylinder port 41 and reservoir port 48, allowing the cylinder to discharge its fluid into the reservoir. Discharge of the fluid from the cylinder 4| allows the weight responsive means to lower, causing the barrier to simultaneously descend through connection I4 and thus permitting entrance of the automobile to the parking area.

To return the coin control to its normal position illustrated in Figs. 7 to 9, I have provided an axially extending sleeve 69 surrounding the shaft 63, the sleeve being connected with the cam 61 and rotatably received in a bearing hanger III. A crank arm II on the outer end of the sleeve is normally held in a vertical position by a spring 72. Turning crank 62 180 trips the latch 52 and brings the cam 61 and arm II to positions where springs 68 and I2 cause the inner disc 64 to turn relative to the outer disc 64, releasing the coin and permitting it to drop into the coin receiving box 73. Removal of the coin from the notches 65 in the discs 64 allows the discs 64 to return to normal positions, the outer disc by gravitation or the crank arm 62 and the inner disc 64 by the action of the spring I2 connected with the crank arm II. When the automobile has passed over the plates I9 and 20, the spring I5 acting against the arm 26 of the connection I4 returns the control to its normal condition in which the barrier II is projected to its arresting position. Upward travel of the ram 42 in the cylinder 4| recharges the cylinder by drawing fluid from the reservoir 49 through conduit 50 to reservoir port 48 and hence through port I6, containing a non-return check valve 17, in communication with the cylinder port 41.

To permit leaving the parking area by the passageway W, I may provide in the tread .plate 20 a trip for releasing the latch 52 topermit retraction of the barrier. The trip 80 is in the form of a bowed leaf spring 8| extending transversely in the tread plate 20 and adapted to be engaged by the wheel of the outgoing automobile. Under the spring BI is a bell crank 82 pivoted at 83 to the plate 20 and having its lower arm connected at 84 to a control cable 85. The cable extends through a conduit 86 to the post 38 of the coin control I5 and upwardly through the post to a bell crank 81 in the housing 31. The bell crank 81 is pivotally connected at B8 to the under side of the reservoir 49 and has a downwardly depending arm 89 adapted to engage the end of the lateral arm 60 of the latch 52. The vehicle wheel passing over the trip 80 causes bell crank 82 to pull the cable 85 and operate the bell crank 91 in the housing 3? with consequent tripping of the valve 45. Thereupon the pressure in cylinder 4| is relieved so that the weight of the automobile imposed on the tread plate 20 will cause the barrier II to retract.

Figs. 11 to 16, inclusive, illustrate another embodiment of the invention wherein the barrier I Ia is normally retracted within the guide tube 90 located midway between boundary posts In of the passageway W. The weight responsive means I3a is normally in the up position relative to the barrier Ila and its movement is transmitted through a control mechanism I ia to the barrier I Ia. As before, the weight responsive means may include a pair of upwardly and inwardly projecting tread plates I9aand 29a connected together at their opposing ends by a hinge ZIa. Guide angles 25a at opposite sides of the tread plates position and close the space beneath them.

The control mechanism I la, housed below the ground level 92 in pit 9i covered by plate 93, includes a double-ended lever 94 connected intermediate its ends at 95 to a bracket 96 depending from the plate. The arm 92 is preferably formed of a pair of channel members 95 spaced apart to receive the bracket 96, and a downwardly extending projection 91 carried by the hinge 2 la for engaging a pin 98 extending between the members 95 and received in openings 99 in the projecting end portion I thereof.

A releasable latch I0! projectng through a vertical 'slot 20I in the guide tube 90, connects the other end of the arm 94 with the barrier I Ia to permit its operation being governed by the remote coin control I5a. The barrier, formed of an H-beam having side flanges I02 and a central connecting web I03, is guided for vertical movement within the tube 90 and is provided with a thrust roller I09 carried on a pin I05. A keeper I05, fixed to the central Web I93 of the barrier, cooperates with the latch IOI for transmitting movement 0 fthe arm 94 to the barrier. The latch IOI is in the form of a retractible plunger 20'! reciprocable in a tube 208 carried by the outer end of the arm 99, the latch being urged by spring 209 into engagement with the keeper I06. The arm 94 is normally held down and the weight responsive means He: held up by a weight 9M attached to the outer end of the arm 94.

Downward movement of the weight responsive means transmits upward movement to the barrier through the double-ended arm 94. As an automobile entering the way W approaches the barrier Ila, its front wheel will be resting on the tread plate I9a, causing the barrier to immediately rise, stopping the automobile where the remote control I5a will be accessible to the driver seated in the automobile. The coin control PM is similar to the above described coin control I5 and includes a manually operated crank I01 carried on 6 the shaft I 08 extending into the housing I09. A pair of discs IIO similar to discs 64 described above, have in their opposing faces notches III registering with the coin chute H2. The outer disc H0 is fixed to the shaft I08 while the inner disc IIO isrotatably carried thereon. The inner disc has an integral sleeve extension II 3 rotatable on the shaft I08 and carrying the cam IHI for engagement with a roller II5 rotatably carried on a lever IIB pivoted at H! to the housing I09. Spring II8 connected with the outer endofthe lever I I6 holds the roller I I5 in engagement with the cam II4. A control cable I I9 connected with the lever I It at I20, extends downwardly through the post 38a of the coin control I5a and through the conduit I2I to a point within pit 9I. The other end of the control cable H9 is connected with a bail I22 attached to a pair of pivoted levers I 23 located at opposite sides of the bearing brackets'96 adjacent the pivot 95 of the arm 94. A-pair of connecting rods I24 extend from the lower ends of the pivoted levers I23 to connect with the retractible bolt 20'! by a wrist pin I25 extending through elongated slots I29 in guide tube 208 and members 95, as illustrated in Figs. 11 and'13.

The inner end of the shaft I08 and sleeve IIS of the coin control I5a are rotatably carried by abearing. hanger I21. A crank arm I28 attached to the outer end of the sleeve II3 holds the inner disc H0 in its normal position in register with the coin chute II2 by a spring I29, while the crank arm I01 on the shaft I08,

' nected to latch I0 I.

carrying the outer disc IIO, holds the notch III in the outer disc in register with the coin chute, by gravitation.

In considering the operation of the form i1- lustrated in Figs. 11 to 16, assume the front wheel of the automobile entering the way -W to. advance upon the weight responsive means I 3a, causing the barrier Ila to be extended to the dotted line position of Fig. 11. Upon insertion of the proper coin into the then accessible coin control I5a, the coin enters the registering notches III of the discs IIO, keying the discs together to transmit rotation on the crank I0'I.to the cam II4. Rotation of *the crank and cam II4 180 pulls the control cable H9 and retracts the latch IOI from the keeper I06,. allowing the barrier IIa to drop. As the cranks I01 and I28 pass over-center, spring I29 causes the inner-disc III! to rotate relative to the outer disc IIO, releasing the coin and allowing it to fall into the coin box I30.

The inner disc III] continues its rotation to the position illustrated in Fig. 16, where its notch III is again in register with the coin chute II2. The outer disc IIO also has continued rotation to bring its notch III again in register with the coin chute.

A trip a, which may be identical'with the trip described above, is carried by the trip plate 20a to permit an' outgoing automobile to pass the barrier. The trip 80a includes a bowed leaf spring I3I extending transversely in the plate 20a to be depressedby the wheel of the vehicle. A bell crank I32 pivotally carried by the plate 2011 on pin I33 is actuated by .depression of the leaf spring. The lower end'of the bell crank is connected to one end of a con -trol cable I34 extending through a conduit I35 to a point within the pit 9|, the. other. end of the cable being-attached to the bail I22 con- It will be seen how-an outgoing vehicle causes the weight responsive means to elevate-the barrier immediately upon 7 driving onto the tread plate 2001. Further advancement of the vehicle causes the trip 80a to be actuated, releasing the latch IOI from the keeper I06 on the. barrier and permitting the barrier to drop.

The form of the invention illustrated in Fig. I1 includes a barrier IIb normally in a retracted position. within. its guide tube I40, and a weight responsive means I3b actuated by' the automobile and connected with the barrier through a control. mechanism: Mb. The barrier IIb and means I3b may be identical in construction with. the. above described corresponding parts except for the connection betweenthe control mechanism and the barrier, The control mechanism I4b includes a double ended lever I4I pivoted at I42 with a bracket I43 depending from the cover plate I44 of the pit I45. One end of the lever I-4I is connected with a downwardly depending link I46. of the hinge connection 2| b as at I41. The other end of the lever I4I carries an extension I48' operating in a vertical slot I49 in the guide tube I40 and projecting into an opening I50 in the central web I03b of the barrier III). A roller II carried by the central web cooperates with the extension I48 to permit free operation of the barrier. A roller I52 carried by the spaced flanges I02b of the barrier travels the back wall of the guide tube I40 to take the thrust -01 the barrier during its up and down movement. Latch I53, controlling the operation of the barrier IIb, includes a weighted member I54pivoted at I55 to the stationary guide tube I40. A lower projection I56 of this member projects through notch I6I in the guide tube I40. A latch I51, pivotally mounted at I58 on the barrier II, is normally held in a released condition by the projection I56. When the latch I51 is held released by the member I54, an automobile driving onto the weight responsive means I3b will cause the barrier I I b to be extended to the arresting position preventing entrance through the way, independently of any antecedent operation of the coin control.

A coin control, identical to the coin control Iia described above, may have its control cable I:I9attached to the weighted member I54 as at I60. Being properly positioned from the weight responsive means I3b, the coin control is made accessible from the drivers seat before the front wheel of the automobile has reached the weight responsive means I31), and while the barrier III) is in its retracted position illustrated in Fig. 17. Upon reception of a coin in the registering notches III of the control discs IIO, rotation of the crank I01 will cause thecam II4 to pivot the lever II6, resulting in tripping of the control latch I53. Projection I56 on the weighted member I54 thus is retracted, allowing the latch I51 to engage the upper end of the notch I6I. As the automobile advances onto the weight responsive means I3b, the barrier III) will rise only a distance suflicient to move the latch I51 into engagement with the upper end of the notch I6I while the outer end I82 of the latch engages a second projection I63 on the member I54 to reset the control latch I53. Engagement of the latch I51 with the upper end of the notch I6I prevents further movement of the barrier II permitting'the automobile to enter the area.

In Figs. 18 to 20 I have illustrated a secondary stopping means associated with a control mechankm I15. similar to the control mechanism il1us 8 trated in Figs. 1 to 10 of the drawings. fortreventing a successive car from entering the parking area until the first car has completely passed the control mechanism I15. Fig. 18 shows a retractable stop I16 located immediately in back of an approaching vehicle when it has reached the position illustrated in dotted lines, at which the coin control I11 is accessible to the driver in the; vehicle.

The control mechanism I15 includes generally barrier I18 positioned in the path of the vehicle between boundary posts I19 located at opposite sides of a passageway, and a weight responsive means in the form of a depressible tread plate I located at one side of the passageway in line with the wheels of the vehicle. A connection IBI between the tread plate and the barrier isin the form of an arm I82 pivotally mounted at one end I83 to the wall of a pit I84. The other end of the arm I82 is connected with the barrier by a link I85, while the tread plate I80 is connected intermediate its ends at I86 adjacent the pivot I 83.

The tread plate and the barrier are normally in their raised position preventing entrance into the parking area. A control cylinder I81 having its plunger I88 connected with the arm I82 and positioned directly below the tread plate is under the control of a remote valve located in the coin control unit I11. The coin control unit may be identical with the unit described in Figs. 7 and 8, and is conditioned for operation by the driver of an approaching vehicle. The operation of the barrier I18, tread plate I80 and their associated control parts, are identical with the form referred to above, except that a weight I89 replaces the spring 15 for returning the barrier and the weight responsive means to their raised positions. The weight I89 is connected with the arm I 82 by a cable I90 trained over an idler roller I9I attached to the cover plate I92 of the pit I84 and operates vertically in a housing I93.

Stop I16 located in advance of the control mechanism I15 permits only one vehicle to pass through the control for each actuation of the coin control I 11. The stop I16 includes a pivoted abutment I94 normally retracted in a pit I95 and pivoted at I98 to a cover plate I91 over the pit. Control cylinders I98 and I99 located in the pits I95 and I 84, respectively, are interconnected by a conduit 200 and operate alternately in opposite directions. The control cylinder I98 has its plunger 20I connected with the pivoted abutment at 202, while the cylinder I99 has its plunger 203 connected at 204 with the arm I82.

When a vehicle reaches the dotted position i1 lustrated in Fig. 18, the weight of the car is imposed on the tread plate I80, at which time the rear wheel of the vehicle has passed the stop I16 and the coin control unit I11 is accessible to the driver in the vehicle. Upon insertion of the coin and actuation of the coin control unit, the tread plate is'permitted to lower causing simultaneous retraction of the barrier I18. Lowering of the barrier I 18 through the connection I8I causes the plunger 203 in cylinder I99 to displace the fluid therein and simultaneous projection of the stop I16 by the control cylinder I 98 connected therewith.

Retraction of the barrier I18 permits the vehicle to enter the parking area while the stop I16 prevents a successive vehicle from entering the control mechanism untilthe entering vehicle has passed completely over the weight responsive means I80, at which time the weight I89 restores the barrier I18 and the tread plate I80 to their raised positions and simultaneously retracts the stop I16.

I claim: Y

1. Control mechanism for an automobile parking area having a way through which automobiles pass, comprising a barrier movable vertically in said way to arrest and permit advancement of an automobile therethrough, means responsive to weight imposed thereon by the automobile for retraction of the barrier to permit advancement through said way, control mechanism connecting said means with the barrier, a cylinder and piston means operable by retraction of the barrier and normally preventing said retraction, and a valve controllable at a location remote from said barrier and governing operation of said cylinder and piston means.

2. Control mechanism for an automobile parking area having a way through which automobiles pass, comprising a barrier movable vertically in said way to arrest and permit advancement of an automobile therethrough, means responsive to weight imposed thereon by the automobile for retraction o1 tne barrier to permit advancement through said way, control mechanism connecting said means with the barrier, a cylinder and piston means operable by retraction of the barrier and normally preventing said retraction, and a remote coin controlled valve governing operation of said cylinder and piston means.

3. Control mechanism for an automobile parking area having a way through which automobiles pass, comprising a barrier movable vertically in said way to arrest and permit passage of an auto- .mobile therethrough, a depressible member in the path of the automobile and responsive to the weight thereof, a connection for transmitting movement from said member to the barrier, a cylinder and piston means under said member operable by movement of said member and normaily preventing said movement and a remote coin controlled valve governing operation of said cylinder and piston means.

4. Control mechanism for an automobile parking area having a way through which an automobile advances into the area, comprising a barrier projectible upwardly in said way from adjacent the ground to a vehicle arresting position and displaceable downwardly to a vehicle passing position, means mounting the barrier for movement to said passing position in response to the weight of the automobile, piston and cylinder holding means operable by movement of said barrier and normally maintaining the barrier in said arresting position, a valve controllable at a location remote from said barrier and governing operation of said piston and cylinder means, and mechanism conditioned by reception of a coin for actuating said valve to release said holding means independently of the weight of the automobile.

5. Control mechanism for an automobile parking area having a way through which automobiles pass, comprising a weight responsive member in said way movable downwardly by the weight of an automobile imposed thereon, a barrier in said way mounted for movement between an active position in which it projects upwardly in said way from adjacent the ground to prevent the passage of an automobile and a downwardly retracted position permitting said passage, means including a lever pivotally mounted beneath the surface of the ground and mechanically interconnecting said weight responsive member and said barrier so that downward movement of the weight responsive member effects movement of the barrier in a predetermined direction between said positions, means positioned beneath said weight responsive member and adapted to prevent the downward movement thereof, and coin responsive mechanism governing the effectiveness of said last mentioned means to prevent said downward movement.

FRED P. DUNN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 467,556 Nelson Jan. 26, 1892 1,247,405 Jay Nov. 20, 1917 1,616,809 McClellan et al Feb. 8, 1927 1,853,934 Shetler Apr.--12, 1932 1,884,447 White Oct.- 25, 1932 1,988,889 Boardman Jan. 22, 1935 2,015,607 Shinn Sept. 24, 1935 2,073,834 Duany et al Mar. 16, 1937 2,200,639 Rice May 14, 1940 FOREIGN PATENTS Number Country Date 20,978 Australia Jan. 30, 1936 100,747 Australia Apr. 22, 1937 202,579

Switzerland Jan. 31, 1939 

